The most accurate way of determining the value of a 1943 copper wheat penny is to have it appraised by a coin expert. The 1943 copper wheat pennies were accidentally minted and there are only 40 that are known to exist.
According to the website CoinTrackers.com, the 1943 copper wheat penny is worth $60,047 for average quality to $85,782 for certified mint state. The first sold 1943 copper wheat penny went for $40,000 in 1958.
Since the 1943 copper wheat pennies are highly sought after, there have been many counterfeit pennies made. The dates of 1945, 1948 and 1949 pennies can be altered to read 1943, so it is highly recommended to seek professional help in determining the authenticity and value.